package com.jqsoft.launcher.util;

import java.nio.ByteOrder;

public class BytesTransUtil {
  
    private String TAG = "BytesTransUtil";  
    private static BytesTransUtil instance = null;
  
    private BytesTransUtil() {  
        // Log.i(TAG, "instance BytesTransUtil");  
    }  
  
    public static BytesTransUtil getInstance() {
        if (instance == null) {  
            instance = new BytesTransUtil();
        }  
        return instance;  
    }  
  
    public boolean testCPU() {  
        if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) {
            // System.out.println("is big ending");  
            return true;  
        } else {  
            // System.out.println("is little ending");  
            return false;  
        }  
    }  
  
    public byte[] getBytes(short s, boolean bBigEnding) {  
        byte[] buf = new byte[2];  
        if (bBigEnding)  
            for (int i = buf.length - 1; i >= 0; i--) {  
                buf[i] = (byte) (s & 0x00ff);  
                s >>= 8;  
            }  
        else  
            for (int i = 0; i < buf.length; i++) {  
                buf[i] = (byte) (s & 0x00ff);  
                s >>= 8;  
            }  
        return buf;  
    }  
  
    public byte[] getBytesEcg(short s) {
        byte[] buf = new byte[2];
//        if (bBigEnding)
            for (int i = buf.length - 1; i >= 0; i--) {
                buf[i] = (byte) (s & 0x00ff);
                s >>= 8;
            }
//        else
//            for (int i = 0; i < buf.length; i++) {
//                buf[i] = (byte) (s & 0x00ff);
//                s >>= 8;
//            }
        return buf;
    }

    public byte[] getBytes(int s, boolean bBigEnding) {
        byte[] buf = new byte[4];  
        if (bBigEnding) {  
            for (int i = buf.length - 1; i >= 0; i--) {  
                buf[i] = (byte) (s & 0x000000ff);  
                s >>= 8;  
            }  
        } else {  
            System.out.println("1");  
            for (int i = 0; i < buf.length; i++) {  
                buf[i] = (byte) (s & 0x000000ff);  
                s >>= 8;  
            }  
        }  
        return buf;  
    }  
  
    public byte[] getBytes(long s, boolean bBigEnding) {  
        byte[] buf = new byte[8];  
        if (bBigEnding)  
            for (int i = buf.length - 1; i >= 0; i--) {  
                buf[i] = (byte) (s & 0x00000000000000ff);  
                s >>= 8;  
            }  
        else  
            for (int i = 0; i < buf.length; i++) {  
                buf[i] = (byte) (s & 0x00000000000000ff);  
                s >>= 8;  
            }  
        return buf;  
    }  
  
    public short getShort(byte[] buf, boolean bBigEnding) {  
        if (buf == null) {  
            throw new IllegalArgumentException("byte array is null!");  
        }  
        if (buf.length > 2) {  
            throw new IllegalArgumentException("byte array size > 2 !");  
        }  
        short r = 0;  
        if (bBigEnding) {  
            for (int i = 0; i < buf.length; i++) {  
                r <<= 8;  
                r |= (buf[i] & 0x00ff);  
            }  
        } else {  
            for (int i = buf.length - 1; i >= 0; i--) {  
                r <<= 8;  
                r |= (buf[i] & 0x00ff);  
            }  
        }  
  
        return r;  
    }  
  
    public int getInt(byte[] buf, boolean bBigEnding) {  
        if (buf == null) {  
            throw new IllegalArgumentException("byte array is null!");  
        }  
        if (buf.length > 4) {  
            throw new IllegalArgumentException("byte array size > 4 !");  
        }  
        int r = 0;  
        if (bBigEnding) {  
            for (int i = 0; i < buf.length; i++) {  
                r <<= 8;  
                r |= (buf[i] & 0x000000ff);  
            }  
        } else {  
            for (int i = buf.length - 1; i >= 0; i--) {  
                r <<= 8;  
                r |= (buf[i] & 0x000000ff);  
            }  
        }  
        return r;  
    }  
  
    public long getLong(byte[] buf, boolean bBigEnding) {  
        if (buf == null) {  
            throw new IllegalArgumentException("byte array is null!");  
        }  
        if (buf.length > 8) {  
            throw new IllegalArgumentException("byte array size > 8 !");  
        }  
        long r = 0;  
        if (bBigEnding) {  
            for (int i = 0; i < buf.length; i++) {  
                r <<= 8;  
                r |= (buf[i] & 0x00000000000000ff);  
            }  
        } else {  
            for (int i = buf.length - 1; i >= 0; i--) {  
                r <<= 8;  
                r |= (buf[i] & 0x00000000000000ff);  
            }  
        }  
        return r;  
    }  
  
    /*----------------------------------------------------------*/  
    /* 对转换进行一个简单的封装 */  
    /*----------------------------------------------------------*/  
    public byte[] getBytes(int i) {  
        return getBytes(i, this.testCPU());  
    }  
  
    public byte[] getBytes(short s) {  
        return getBytes(s, this.testCPU());  
    }  
  

    public byte[] getBytes(long l) {
        return getBytes(l, this.testCPU());  
    }  
  
    public int getInt(byte[] buf) {  
        return getInt(buf, this.testCPU());  
    }  
  
    public short getShort(byte[] buf) {  
        return getShort(buf, this.testCPU());  
    }  
  
    public long getLong(byte[] buf) {  
        return getLong(buf, this.testCPU());  
    }  
  
    /****************************************/  
    public short[] Bytes2Shorts(byte[] buf) {  
        byte bLength = 2;  
        short[] s = new short[buf.length / bLength];  
        for (int iLoop = 0; iLoop < s.length; iLoop++) {  
            byte[] temp = new byte[bLength];  
            for (int jLoop = 0; jLoop < bLength; jLoop++) {  
                temp[jLoop] = buf[iLoop * bLength + jLoop];  
            }  
            s[iLoop] = getShort(temp);  
        }  
        return s;  
    }  
  
    public byte[] Shorts2Bytes(short[] s) {  
        byte bLength = 2;  
        byte[] buf = new byte[s.length * bLength];  
        for (int iLoop = 0; iLoop < s.length; iLoop++) {  
            byte[] temp = getBytes(s[iLoop]);  
            for (int jLoop = 0; jLoop < bLength; jLoop++) {  
                buf[iLoop * bLength + jLoop] = temp[jLoop];  
            }  
        }  
        return buf;  
    }  
  
    public byte[] Shorts2BytesEcg(short[] s) {
        byte bLength = 2;
        byte[] buf = new byte[s.length * bLength];
        for (int iLoop = 0; iLoop < s.length; iLoop++) {
            byte[] temp = getBytesEcg(s[iLoop]);
            for (int jLoop = 0; jLoop < bLength; jLoop++) {
                buf[iLoop * bLength + jLoop] = temp[jLoop];
            }
        }
        return buf;
    }

    /****************************************/
    public int[] Bytes2Ints(byte[] buf) {  
        byte bLength = 4;  
        int[] s = new int[buf.length / bLength];  
        for (int iLoop = 0; iLoop < s.length; iLoop++) {  
            byte[] temp = new byte[bLength];  
            for (int jLoop = 0; jLoop < bLength; jLoop++) {  
                temp[jLoop] = buf[iLoop * bLength + jLoop];  
            }  
            s[iLoop] = getInt(temp);  
            System.out.println("2out->"+s[iLoop]);  
        }  
        return s;  
    }  
  
    public byte[] Ints2Bytes(int[] s) {  
        byte bLength = 4;  
        byte[] buf = new byte[s.length * bLength];  
        for (int iLoop = 0; iLoop < s.length; iLoop++) {  
            byte[] temp = getBytes(s[iLoop]);  
            System.out.println("1out->"+s[iLoop]);  
            for (int jLoop = 0; jLoop < bLength; jLoop++) {  
                buf[iLoop * bLength + jLoop] = temp[jLoop];  
            }  
        }  
        return buf;  
    }  
  
    /****************************************/  
    public long[] Bytes2Longs(byte[] buf) {  
        byte bLength = 8;  
        long[] s = new long[buf.length / bLength];  
        for (int iLoop = 0; iLoop < s.length; iLoop++) {  
            byte[] temp = new byte[bLength];  
            for (int jLoop = 0; jLoop < bLength; jLoop++) {  
                temp[jLoop] = buf[iLoop * bLength + jLoop];  
            }  
            s[iLoop] = getLong(temp);  
        }  
        return s;  
    }  
  
    public byte[] Longs2Bytes(long[] s) {  
        byte bLength = 8;  
        byte[] buf = new byte[s.length * bLength];  
        for (int iLoop = 0; iLoop < s.length; iLoop++) {  
            byte[] temp = getBytes(s[iLoop]);  
            for (int jLoop = 0; jLoop < bLength; jLoop++) {  
                buf[iLoop * bLength + jLoop] = temp[jLoop];  
            }  
        }  
        return buf;  
    }  
  
}